Danny Arty

отключить autoplay - скролл до 1-го слайда - включить autoplay

navList[i].addEventListener("click", (evt) => {
    let currentLink = tabContainer.querySelector(
      ".slidersTab__tab-label.current"
    );
    let currentTab = tabContainer.querySelector(
      ".slidersTab__slidersItem.current"
    );
    //добавить 4 строчки -- start 
    let currentSlider = tabList[i].querySelector('.slidersTab__slider-body').swiper;
    currentSlider.autoplay.stop();
    currentSlider.slideTo(0, 0, false);
    currentSlider.autoplay.start();
    //-- end
    currentLink.classList.remove("current");
    navList[i].classList.add("current");

    currentTab.classList.remove("current");
    tabList[i].classList.add("current");    
});

const mySwiper = new Swiper('.slider-3steps', {
  scrollbar: {
    el: document.getElementById('swiperScrollbar') //где swiperScrollbar - id скорллбара соответственно
  },
});

let containers = document.getElementsByClassName('promo-group__swiper-container');
Array.from(containers).forEach(function(element) {
    var swiper = new Swiper(element, {
       navigation: {
          nextEl: element.querySelector('.swiper-button-next'),
          prevEl: element.querySelector('.swiper-button-prev')
       }
    });
});

var sliders = document.querySelectorAll('.swiper'),
    prevArrow = document.querySelectorAll('.swiper-btn-prev'),
    nextArrow = document.querySelectorAll('.swiper-btn-next');
sliders.forEach((slider, idx) => {
    let swiper = new Swiper(slider, {
        slidesPerView: 6,
        spaceBetween: 10,
        navigation: {
          nextEl: nextArrow[idx],
          prevEl: prevArrow[idx],
        },
        breakpoints: {
          320: {
            slidesPerView: 2,
            spaceBetween: 10
          },
          480: {
            slidesPerView: 3,
            spaceBetween: 10
          },
          970: {
            slidesPerView: 6,
            spaceBetween: 10
          }
        }
      })
})

<div class="slider-wrapper">
   <div class="swiper">
      <div class="swiper-wrapper">
         <div class="swiper-slide">Slide 1</div>
         <div class="swiper-slide">Slide 2</div>
         <div class="swiper-slide">Slide 3</div>
       </div> 
    </div>
    <!-- Кнопки -->
    <div class="myslider-prev swiper-button-prev"></div>
    <div class="myslider-next swiper-button-next"></div>
</div>

var swiper = new Swiper('.swiper', {
  ...тут ваши прочие параметры
  navigation: {
    nextEl: '.myslider-next',
    prevEl: '.myslider-prev',
  },
});

.swiper-button-disabled{
    display:none;   
}